Sundini

In the north, bordering Eiðisflógvi gulf (part of the Atlantic Ocean), Sundini starts between Tjørnuvík and Eiðiskollur (near Eiði).

[3] The complex bathymetry of the Sundini and Tangafjørður, with many isolated areas exceeding −50 metres (−160 ft) intermitted by shallow sections, is thanks to the glaciation during the Weichselien ice age.

[4] The Við Streymin area constitutes a former glacial drainage divide where the glaciar would bisect in a northward and southward flow.

[5] Glaciation has also caused the formation of several inlets in or bordering Sundini, such as Kollafjørður, the Skálafjørður fjords, the Hvalvík and Tjørnuvík bays, as well as Saksunardalur valley.

The villages on Streymoy are, from north to south: Tjørnuvík, Haldórsvík, Langasandur, Nesvík, Hvalvík, Streymnes, Við Áir, Hósvík and the Norðuri í Sundum neighbourhood of Kollafjørdur.

In December 2020 a second link, the Eysturoyartunnilin, was opened, providing a much shorter bypass for the long route from Tórshavn to Southern Eysturoy via the Streymin Bridge.

Three bays are appointed as hvalvág where pilot whales may be brought ashore during a grind: Hvalvík, Norðskáli and Tjørnuvík, as well as in Kollafjørður.